2006 SD Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 146Get this manual
POWERHEAD CYLINDER HEAD ASSEMBLY Rocker ArmShaft Inspect the cam-riding face and tip of the adjusting screwIf excessive wear is found, replace the rocker arm andor adjusting screw
ValveNalve Guide
To check valve guide to valve stem clearance, measure the following: Valve stem outside diameter Valve guide inside diameter Valve stem outside diameter: IN 0.2156 to 0.2161 in(5.475 to 5.490 mm) EX 0.2146 to 0.2152 in(5.450 to 5.465 mm) Valve guide inside diameter: IN 0.2165 to 0.2170 in(5.500 to 5.512 mm) EX 0.2165 to 0.2170 in (5.500 to 5.512 mm)
To check rocker arm to shaft clearance, measure the following: Rocker arm shaft outside diameter Rocker arm inside diameter Rocker arm shaft outside diameter: 0.5107 to 0.5112 in(12.973 to 12.984 mm) Rocker arm inside diameter: 0.5118 to 0.5125 in(13.000 to 13.018 mm) Rocker arm to shaft clearance: Standard: 0.0006 to 0.0018 in(0.016 to 0.045 mm) Service limit: 0.0024 in(0.060 mm) Valve guide to valve stem clearance Standard Service Limit 0.00040.0015 in0.0028 inIN (0.0100.037 mm) (0.070 mm) 0.00140.0024 in0.0035 inEX (0.0350.062 mm) (0.090 mm) If clearance exceeds service limit, replace valve andor valve guide